my boyfriend and I had dry sex. I was on my period when we did it (I had a pad on). I noticed that there was precm on his boxers and he had made my underwear a little wet. the problem is that my underwear had moved a little to the side. so I was worrying if his precm could have made its way through his boxers and into my vaginal opening? (we both had our underwear on at all times) I am terrified of the thought of being pregnant. help please? thanks ...